Adjustment for sieves.



A. A. PETERSON.

ADJUSTMENT FOR SIEVES.

APPLICATION FILED JULY 1, 1912.

Patented Ja11.21, 1913.

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MN i m A. A. PETERSON.

ADJUSTMENT FOR SIEVES.

APPLICATION FILED JULY 1, 1912.

Patented Jan. 21, 1913.

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0/. 1 1 a 4.2 6 w 4 s I II..I.= J" 6 Q Bil M k 5 3 .5 0. H 7 4, L 1 M ia a f y AMOS A. PETERSON, F GENOA, NEBRASKA.

ADJUSTMENT FOR, SIEVES.

Specification of Letters Patent.

Patented Jan. 21, 1913.

Application filed. July 1, 1912. Serial No. 707,025.

To all whom it may concern:

Be it known that I, Amos A. PETERSON, citizen of the United States,residing at Genoa, in the county of Nance and State of Nebraska, haveinvented certain new and useful Lnprowements in Adjustments for Sieves,of which the following is a specification, reference being had thereinto the accompanying drawing.

This invention relates to harvesting machinery and has special referenceto an adjustment for sieves, grain pans, and shoes for such machinery.

One object of the invention is to provide a simultaneous adjustment forboth ends of the device to which the improvement is applied.

Another object of the invention is to provide means whereby either endof the device may be independently adjusted.

With the above and other objects in view this invention consists ingeneral of certain novel constructions, combinations and arrangements ofparts, as will be hereinafter fully described, illustrated in theaccompanying drawings, and specifically claimed.

In the accompanying drawings like characters of reference indicate likeparts in the several views, and: Figure 1 is a perspec tive view of asieve and a box therefor constructed in accordance with this invention.Fig. 2 is an end view thereof. Fig. 3-is a detail showing a certainoperating lever. Fig. l is a detail showing a certain slide used inconnection herewith. Fig. 5 is a detail showing a certain lock for oneof the gears. Fig. 6 is a section through certain plates used with thedevice.

The box supporting the sieve is provided with a bottom 10 and sides 11.The sides 11 are preferably reinforced by strips 12 and at each end ofthe upper corners of each side there is provided a plate 18 wherein areslots 14 through which pass bolts 15 so that the plate is slidablymounted at its respective corners, and on this plate is also provided anoutstanding rib 16 having a flange 17 projecting toward the end of thebox adjacent which the plate is secured. Each of these flanges 17 isslotted as at 18 and bolts 19 are held in these slots and in similarslots 20 formed in alinement with the slots 18 but located in the baseof the plate 13. These bolts furthermore pass through bolt holes 21 in aguard plate 22 which projects beyond the respective end of the box andis provlded with a vertically disposed slot 23.

The screen 24 is supported at each end on a shaft 25 the ends whereofpass through the slots 23. ,On each of these shafts 25 at each endthereof is a hand wheel 26 and in alinement with the respective flange17 is a gear 27 which meshes with a rack 28 formed on the edge of theadjacent flange. By means of this feature of the invention by turningone of the hand wheels 26 in the proper d rection the gears 27 at thatend of the device will move up and down the rack as the case may be,thus simultaneously adjusting both sides of that end. In order to lockthe gears in adjusted position on each shaft ad jacent the respectivegear is a sleeve 29 which carries an outwardly projecting arm 30 whereonis a finger 31 adapted to fit over the gear teeth when the sleeve isslid inward so that this finger jams between the gear and its rack, thuslocking the device from movement downward.

On each of the braces 12 is located a bearing 30 wherethrough passshafts 31, each of which is provided at each end with a gear 32 whichmeshes with a rack 33 formed on the rib 16 of each plate 18. 1 0n eachshaft 31 there is further provided a ratchet 34: with which engages apawl 35 braced firmly against the ratchet by a spring 86, the pawl beingpivoted to the respective side wall 11. Straddling the ratchet 84; oneach shaft- 31 is a yoke 87. This yoke has each of its arms providedwith an elongated slot 38 wherethrough the shaft passes, and centrallydisposed in the bight of the yoke is a tongue 89 adapted to engagebetween the teeth of the ratchet 34. To the yoke is fastened anoperating handle 40 so that by forcing the tooth 89 between two of theratchet teeth the handle may be turned with the consequence that therespective shaft will be revolved. By this means both of the plates 18on either side may be raised or lowered simultaneously and held in theproper position by the spring pawl 35 on that side.

There has thus been provided a simple and elficient device of the kinddescribed, and for the purpose specified.

It is obvious that many minor changes may be made in the form andconstruction of this invention without departing from the materialprinciples thereof and it is therefore not wished to confine theinvention to the exact form herein shown and described but it is wishedto include all such as properly come within the scope claimed.

Having thus described the invention, What is claimed as new, is

1. In a device of the kind described, a casing, a shaft extending acrosseach end of said casing, a screen supporting said shaft, means tosimultaneously move both ends of said shaft in the same direction, andother means to move one end of each shaft simultaneously in the samedirection.

2. In a device of the kind described, a casing provided with a bottomand sides, aplate slidably mounted at each upper corner of each side, arack on each plate, a shaft extending across each end of said casing andprovided with gears engaging said racks, a screen supported by saidshafts, means to rotate said shafts and thereby cause the gears totravel on said racks, and other means to elevate the plates 011 eachside of the casing simultaneously.

3. In a device of the kind described, a casing provided with a bottomand sides, a plate slidably mounted ateach upper corner of each side, arack on each plate, a shaftextending acrosseach end of said casing andprovided with gears engaging said racks, a screen supported by saidshafts, meansto rotate said shafts and thereby cause the gears to travelon said racks, and other means to elevate the plates on each side of thecasing simultaneously, the lastment-ioned means comprisinga shaftextending horizontally along each side of the easing, other racks onsaid plates, a gear at each end of the last-mentioned shafts engagingthe last-mentioned racks, a ratchet on each of the last-mentionedshafts, and a lever engageable with each ratchet to rotate the shaft,said lever being mounted on the respective shaft.

4. In a device of the kind described, a casing provided with a bottomand sides, a plate slidably mounted at each upper corner of each side, arack on each plate, a shaft extending across each end of said casing andprovided with gears engaging said racks, a screen supported by saidshafts, means to rotate said shafts and thereby cause the gears totravel on said racks, and other means to elevate the plates on each sideof the casing simultaneously, the lastmentioned means comprising a shafteX- tending horizontally along each side of the casing, other racks onsaid plates, a gear at each end of the last-mentioned shafts engagingthe last-mentioned racks, a ratchet on each of the last-mentionedshafts, a vlever engageable with each ratchet to rotate the shaft, saidlever being mounted on the respective shaft, and locking means for eachof said shafts.

In testimony whereof I hereunto affix my signature in presence of twowitnesses.

AMOS A. PETERSON.

Witnesses OLIVER B. MILLER, ALFRED F. PETERSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

